/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --ink: #1b1b22;
  --ink-soft: #55555f;
  --border: #e4e1d8;
  --accent: #d97a3f;
  --accent-ink: #ffffff;
  --success: #2f8f5b;
  --danger: #c0392b;
  --sans: "Inter", system-ui, sans-serif;
  --display: "Manrope", "Inter", system-ui, sans-serif;
  --radius: 14px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --surface: #1f1f24;
    --ink: #f2f1ec;
    --ink-soft: #b7b6b0;
    --border: #34343b;
    --accent: #e08a4f;
    --accent-ink: #1b1b22;
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; line-height: 1.1; letter-spacing: -0.01em; font-family: var(--display); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.is-hidden { display: none !important; }
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--surface); color: var(--ink);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   4. Header / footer
   ============================================================= */
.site-header { padding: 1.1rem 0; border-bottom: 1px solid var(--border); }
.header-row { display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--display); font-weight: 800; font-size: 1.15rem; }
.header-nav a { font-size: .9rem; color: var(--ink-soft); }
.header-nav a:hover { color: var(--ink); }

.site-footer { border-top: 1px solid var(--border); margin-top: 3rem; padding: 1.5rem 0; color: var(--ink-soft); font-size: .85rem; }
.footer-row { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; align-items: center; justify-content: space-between; }
.footer-row nav { display: flex; gap: 1.25rem; }

/* =============================================================
   5. Hero
   ============================================================= */
.hero { padding: 2.75rem 1.25rem 1.5rem; text-align: center; }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.6rem); max-width: 20ch; margin: 0 auto; }
.hero .subtitle { color: var(--ink-soft); max-width: 56ch; margin: .9rem auto 0; font-size: 1.02rem; }

/* =============================================================
   6. Tool card
   ============================================================= */
.tool-section { padding-bottom: 2rem; }
.tool-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem; box-shadow: 0 1px 3px rgba(0,0,0,.04);
}

.tool-tabs { display: flex; gap: .5rem; margin-bottom: 1.1rem; border-bottom: 1px solid var(--border); }
.tool-tab {
  padding: .65rem 1rem; font-weight: 600; font-size: .92rem; color: var(--ink-soft);
  border-bottom: 2px solid transparent; margin-bottom: -1px; transition: color .15s var(--ease-out);
}
.tool-tab.is-active { color: var(--accent); border-bottom-color: var(--accent); }

.tool-grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 720px) {
  .tool-grid { grid-template-columns: minmax(0,1fr) minmax(0,1fr); align-items: start; }
}

.field-group { margin-bottom: 1.1rem; }
.field-group.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field-label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: .4rem; }
.field-select, .field-input {
  width: 100%; padding: .65rem .75rem; border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--ink); font: inherit; font-size: .95rem;
}
.field-input + .field-label { margin-top: .7rem; }
.field-color { width: 100%; height: 44px; border: 1px solid var(--border); border-radius: 10px; padding: 3px; background: var(--bg); }

.style-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; }
.style-btn {
  padding: .6rem .5rem; border: 1px solid var(--border); border-radius: 10px; font-size: .85rem; font-weight: 600;
  text-align: center; transition: border-color .15s, background .15s;
}
.style-btn.is-active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

.center-row { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.emoji-input { width: 70px; text-align: center; font-size: 1.2rem; flex: 0 0 auto; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .8rem 1.2rem; border-radius: 10px; font-weight: 700; font-size: .95rem;
  transition: transform .12s var(--ease-out), filter .12s;
}
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-secondary { background: var(--bg); border: 1px solid var(--border); color: var(--ink); }
.btn-ghost { background: none; color: var(--ink-soft); text-decoration: underline; }
.btn-small { padding: .5rem .85rem; font-size: .85rem; }

.tool-result { display: flex; flex-direction: column; }
.preview-2d {
  aspect-ratio: 1/1; width: 100%; max-width: 340px; margin: 0 auto;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); border: 1px dashed var(--border); border-radius: 12px;
}
.preview-2d canvas, .preview-2d svg, .preview-2d img { max-width: 100%; max-height: 100%; }

.preview-3d-wrap { position: relative; aspect-ratio: 4/3; width: 100%; margin-top: 1rem; border-radius: 12px; overflow: hidden; background: var(--bg); border: 1px dashed var(--border); }
.preview-3d { position: absolute; inset: 0; }
.preview-3d-msg { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--ink-soft); font-size: .9rem; text-align: center; padding: 1rem; }

.warnings { margin-top: .85rem; display: flex; flex-direction: column; gap: .4rem; }
.warning { font-size: .85rem; padding: .55rem .75rem; border-radius: 8px; }
.warning.warn { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }
.warning.ok { background: color-mix(in srgb, var(--success) 12%, transparent); color: var(--success); }

.result-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.1rem; }

.privacy-badge { margin-top: 1.25rem; font-size: .85rem; color: var(--ink-soft); }
.limits-note { margin-top: .4rem; font-size: .8rem; color: var(--ink-soft); }

/* =============================================================
   7. Ad slots
   ============================================================= */
.ad-slot {
  max-width: 1080px; margin: 2rem auto; padding: 1rem;
  border: 1px dashed var(--border); border-radius: 10px; min-height: 90px;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-soft); font-size: .8rem; letter-spacing: .04em; text-transform: uppercase;
}

/* =============================================================
   8. Content section
   ============================================================= */
.content-section { padding: 1.5rem 1.25rem 3rem; max-width: 760px; }
.content-section h2 { font-size: 1.35rem; margin: 2rem 0 .9rem; }
.content-section p { color: var(--ink-soft); margin-bottom: .9rem; }
.steps { padding-left: 1.2rem; color: var(--ink-soft); }
.steps li { margin-bottom: .6rem; }
.steps strong { color: var(--ink); }

.usos-grid { display: grid; grid-template-columns: 1fr; gap: .9rem; margin-top: .5rem; }
@media (min-width: 540px) { .usos-grid { grid-template-columns: 1fr 1fr; } }
.uso-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1rem; }
.uso-card h3 { font-size: 1rem; margin-bottom: .35rem; }
.uso-card p { font-size: .88rem; margin: 0; }

.faq-list { display: flex; flex-direction: column; gap: .6rem; }
.faq-item { border: 1px solid var(--border); border-radius: 10px; padding: .2rem .9rem; background: var(--surface); }
.faq-item summary { padding: .75rem 0; font-weight: 600; cursor: pointer; }
.faq-item p { padding-bottom: .85rem; margin: 0; }

.mas-herramientas { margin-top: 2.5rem; }
.mas-herramientas-note { color: var(--ink-soft); font-size: .9rem; }

/* =============================================================
   9. Reduced motion
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}